v0.4.0

Deterministic API & Production Readiness

Release focused on determinism, correctness, and production readiness.

⚠️ Breaking Changes

• Removed all f64-based constructors
• Introduced DurationParts { seconds, nanos } for exact, deterministic input

Added

• DurationParts – deterministic replacement for f64 with validation
  • DurationParts::new() with range check
  • DurationParts::as_nanos() -> u128
• Full CI/CD pipeline (clippy, tests, docs, MSRV, cargo-deny)
• Embedded validation (no_std, Cortex-M, RISC-V)
• Automated publishing workflow
• Extended documentation:
  • architecture, invariants, leap seconds, embedded usage
• Property-based tests (roundtrip, leap seconds, ordering)
• Time::NANOS_PER_YEAR

Changed

• All constructors migrated to DurationParts
• Updated:
  • all examples (17 files)
  • integration tests
  • benchmarks
• Added strict input validation

Performance

No regressions:

Operation	Cost
Arithmetic (panicking)	~0.5 ns (≈ raw u64)
Checked ops	~4.3 ns
Fixed conversions	~0.8–1.0 ns
UTC conversions	~9–22 ns

Notes

• Type-safe time domains preserved
• Fixed conversions remain zero-cost
• UTC stays explicit and leap-second aware

Upgrade

Replace:

// Before
Time::<Gps>::from_week_tow(week, 432_000.0)

// After
Time::<Gps>::from_week_tow(week, DurationParts {
    seconds: 432_000,
    nanos: 0,
})